How to calculate converting MP to LLP
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RT: The existing MP system (1.2 MPaG, 220°, 4 t/h) needs to be replaced with an LLP system (0.2 MPaG, 133°). It is necessary to calculate the flow rate to determine whether it is required to change the pipe diameter (the current diameter is 100). I’m not a chemistry specialist; please help me calculate this. Could you tell me what formula to use and how to carry out the calculation? Thank you!
(1.2+0.1)*V1/(273+220)=(0.2+0.1)*V2/(273+133); thus, V2=3.568V1. This means that the flow rate after the modification is 3.568 times that before the modification. The value of V1 can be calculated using the formula PV=NRT. The gas flow velocity can then be used to verify this, and it is estimated that the pipe diameter needs to be increased
The two steam flows have different velocities: the LLP flow has a velocity of 15–20 m/s, while the MP flow has a velocity of 20–40 m/s. Both of these steams are superheated, with velocities ranging from 40–60 m/s. Perform the calculations; by reducing the velocity, the pipe diameter can remain unchanged